The above photo shows all the tools needed for the work (although, I would add some more 'cut-out little pieces of paper'). It is estimated that four thousand Little pieces of papers would be used to cover that cardboard).

Those little cut-out pieces of paper (as showed in the above picture), are actually part of some of my 'failed-painting attempts'. So I don't waste the used materials for the painting. Anyway, the last stage is to assemble the cut-out papers together in an orderly manner.